Silver Surfer Guide
”Silver Surfer Guide is a website dedicated to those users who are new to computers. Lesson based this site is suitable for both young and not so young; for those who simply want to learn how their computer works or just want a refresher course.”

http://stereopsis.com/flux/
”If you spend your entire day staring into the pit of an eye-burning LCD, free application F.lux may be right up your alley. This free utility adjusts the glow of your monitor—both the brightness and tint—based on the time of day, dimming your monitor later into the evening and tinting the screen colour based on the kind of lighting you employ.”